Packing.



T. SMITH. PACKING.

APPLIOATION FILED NOV. 18, 1913. Y

Patented July '14, 1914.

p 2 EBTS-SHBBT 1. @Z

T.. SMITH.

` PACKING.

APPLIUATIONI'ILED NOV. 18, 1913.

1,103,322. Patented Ju1y14,1'914 2 SHEETS-SHEET 2.

j I llllllllllll 'H M TTOMAS SMITH, OE SAN LUIS POTOSI, MJEXCO.

PACKING.

Application .filed November 13, i913. .Serial No. 801,686.

To all whom it may concern:

lie it known that i, 'inoiras SMITH, a citizen of the United States, residing at San Luis Potosi, Mexico, have invented a new and useiul Facking, of which the following is a specification.

rifhe device forming the subject matter of this application is a packing, adapted to surround a reciprocating element, such as a piston rod, to prevent Afluid pressure from leaking along the surface of the rod, longitudinally of the same.

This invention aims to provide a packing so constructed as to meet the demands occasioned by any and all structures, and to prevent the pressure from escaping from an inclosing chamber, such as a cylinder, into the atmosphere.

Another object of the invention is to provide a packing for piston rods, comprising a plurality of segmental rings, novel means being provided for holding the segmental rings against rotation, whereby the spaces between the adjacent ends of the constituent members oit the rings may be maintained out of alinementin successive rings.

Another object of the invention is to provide novel means 'for assembling the packing rings and tor holding the same in place within the gland and, more specifically within the ring` holding cup so that the pressure upon the rings longitudinally of the rod may be adjusted, thereby regulating the constricting ei'ort of the rings upon the rod.

TWith the above and other objects in view which will appear as the v"description proceeds, the invention resides in the combina# tion and arrangement of parts and in the details of construction'hereinafter described and claimed, it being understood that changes in the precise embodiment ot' the invention herein disclosed can be made within the scope of what is claimed without departing` from the spirit of the'invention.

in the accompanyingdrawing :-Figu're 1 shows in longitudinal section, one form of the invention; Fig. 2 is a cross section on the line 2-2 oi 1 looking to thevlei't; 3 is a cross section on the line 2-2Joi` Fig. 1, looking tudinal section showing a modified Jr'orm of the invention; Fig. 5 is a side elevation showing one of the packing rings; Fig. 6 is an elevation of the key or is assembled with the ring shown in- Fig.-

Spcciiication ofietters Eatent.

to the right; Fig. 4 is a longi- Patented July i4, 19t/i.

7 shown in Fig. 6; Fig. 3 is a longitudinal section of the ring holdingcup, the view depicting a modification applicable to either of the -forms hcreinbefore described; Fig.` 9 is an end elevation of the cup as employed in Fig. 1 one ofthe rings and the bridges thereon .appearing in elevation; Fig. 10 is a view similar to Fig. 9 but showing a slight modification; Fig. 11 is-a top plan oif one form of bridge; Fig. 12 is a top plan show-v ing a modiiied form of bridge; Fig. 13 is an end elevation of the cup,certain' of the rings therein being broken away, Fig. 13 illustrating a modification.

In the accompanying drawing, the numeral 1 indicates a cylinder head having an opening 2 and provided with a stuiing boi; 3. Applied to the end of the stuiiingboXl 3 is a gland 4 held in place by bolts 5 or in any other suitable manner, packing rings 6 being interposed between the gland 4and the end of the stuffing boX 3, the gland 4 being recessed as indicated'at 7, if desired, to receive the packing rings 6. The gland 4 is provided with an opening 8. Mounted to reciprocate in the openings 2 and S is a piston rod 9 the diameter oi which preff erably is slightly less than the diameter of the openings 2 and S.

An abutment ring 10 surrounds the rod 9` adjacent the cylinder head 1 and is provided with an outstanding flange 11 receivingone end of a compression spring 12, the other end of which abuts against the cylinder head l1.

Surrounding the rod 9 adjacent the gland j 4 is a joint ring 13, the forward end of which is received in `a recess 14, in the inner Jface of the gland 4. The recess 14 and the abutting face of the joint ring 13 arecurved or eoncaved outwardly, upon an arc, the center of which' lies within the stuiiing box 3, the construction beingisuch that the joint ring 13 may be permitted to have a slight swinging movement in the recess 14, along with the rod 9,` after the manner of aball` ring 13,j the rod 9 is surrounded by af 5cup 15 having an end wall 16 which ,abuts against the joint ring y of the cup 15 longitudinal slots r `1'? are formed.. The slots 17 are shown as being` disposed opposite to each other,

bridge 'which any number of slots may be provided, l-

and socket joint. To the rearl of thejoint f Fig. 7 is a plan of the bridge which is i 13, .1in the side wall.

althou h j :ucV

vternating with the slots 17 andvpreferably disposed 90 therefrom are longitudinally extended seats 29 which are kof curved or semi-cylindrical transverse outline. Disposed Within the cup and abutting against the end Wall leef the cup is a pri.-`

v18 areequipped'vvith rectangular seats 20 adapted to receive bridges 21 having ribs `22 'Wh-ich register in the longitudinal slots 17jof the cup 15. The bridges 21 are of the same Widthy as the ring 18. Disposed to the rearof the primary ring 18 are other rings 23 and 24, the rings 23 and 24 being in mutual abutment, the ring 23 abutting against the ring 18. These secondary rings 23 and 24comprise,ea'ch, segmental parts 25 spaced apart as indicated at 26. The parts 25 vof the rings 23 and 24 are equipped in" their. peripheries With conc'aved' seats 27. The radii'oft-he seats'27 are llonger than the radii of the seats 29 in in the seats 29 ofthe cup 15 and in the seats 27 of the ring parts 25 are cylindrical keys 28. The keys 28 in peripheralr outline conforml `closely tothe sea-ts 29 'in the cup 15, but -it somewhat loosely inthe seats 27 of the ring parts 25. 'i

The rearmost secondary ring 24 abuts against a ring 30, surrounding` the rod 9 and in its-turn abutting against the fla-nge 11'of the ring 10. j This ring 30 which is partially engaged Withinthe cup 15 is a carrying ring merely and ordinarily has tien with respect to the r'od 9. However, at times,an expansion of the carrying ring'30 Amay be necessary, notably, if there are any projections upon the rod y9. `With this end in v'ifeW, the ring 30 mayfconsist, asshovvn in 1i`iga y8, of separable parts 31'united by dovv'el pins 32. lith the same end in View, the opening in the cup 15 may be of any desired diameter, and if deemed expedient as shown in Fig. 8, 'the opening in the cup may be provided With a multi-part bushing 33,

united by doWel pins 34.

In practical operation, the bridges 21jare of the primary ring 18, and lthe-ring is pushed i'orivardlyinto mounted in the seats 20 place,the' ribs 22 on the bridges 21 registerslots 17 of the cup primary ring 18kv is in the cup. vThe sixteenth Vof an'inch in length lessthan the combined Widths of the secondary rings 23 Y...and 24, are mounted in the seats 27 'of the rings and in the seats 29 cf'thecup ll5. Thus it will 'be seenthat the' ring`s24 and 23.c'an not rotate to any appreciable. extent- Within the' cup. Since all" ofthe rings 24, 23 and .18 ,cannetrotatevvithin the'V cup,1;the.. open.

the cup 15. Engaged y ltion, therefore,

f 1n Figs. 4-7, the cylinder head is denoted no prehensile acl`mental parts ends, adaptedtoreceive bridges 47 shown keys 28 are of cylindrical form and ythat between the constituent Segthe radii of the keys 27 in the rings 23 and Y 24 are of greater length than the radiiof the seats 29 in the cup 15. Owing to these features, the rings 23 and 24 Willv adjust themselves properly to the internal diameter of the cup 15 and the externaldiameter of.k

the rod 19;

As Will be understood readilyfrom Fig. 1, the compression spring 12, abutting against the cylinder head 1 and against the flange 11 of the ring 10,r advances the ring 10, together With the rings 24, 23, 18, the ,cup 15 and the joint ring 13, the result being that a iiuid Itight joint is eifected circumferentiallyof the rod 19 by the packing rings 18, 23 and 24.- f v Referring to the modified form of the invention sho-Wn in Figs. 4 to 7, this form of the device resembles in many particulars, the

Vstructure delineated in Fig. 1. The descripmay .be vshortened accordby the numeral 35 and the gland at 36 the means of bolts 37 or the like. The reciprocating rod is indicated at 38 andthe rocking joint ring is shown at 39. The numeral 40 Alatter being separable from the cylinder c head and being assembled therewith by designates the cup and the compression4 -springis shown at r41, the same being received at one end in a yrecess -'42 formed With the cylinder spring 41 is shown as someabutment ring 10411 primary packing ring is and vcomprises separable seghaving slots 46in their meeting of Fig. 1.- The `shown at 45 -inbefore described and the cylindrical keys `51 being' used 'as above mentioned. lThe length ofthe cylindrical key51 is slightly less, sa'y one-siizteenth of an inch, than the combined Width of the several rings 45 and 48. Obviously, tvith the seats49 pa'el'i'ng rings to the? keys 51, coperating coperate properly With' the rod ,'38 and `With tlie'c'upl 40, `Without,'..

head. The abutment ringy (43 Which is engaged'in thel forward end of' f the compression what thinner than the primaryv ring 45.

and 50 permit the several however, permitting the openings between the parts of the several rings to come into alinement longitudinally of the rod 38.

For convenience in claiming the invention, the cylinder' head 1, the stuffing box 3 and the gland 4 or the cylinder head 85 and the gland 36, may be described as an inclosing structure.7

In Fig. 9 one of the segmental rings is denoted generally by the numeral 100, the seats being denoted by the. numeral 101. If there is a steam pressure within the seats 29, the parts of the segmental ring 100 will be forced toward the center of the cup. Now, so long as the slots 17 areexactly opposite to each other, and so long as the ribs 22 on the bridges 21 are located exactly midway between the ends of the bridges, the structure will operate satisfactorily, but, in practice, these ideal conditions rarely exist. As a consequence, when the parts of the segmental ring 100 move toward the center of the cup, the bridges 21 are tilted and an opening, indicated at 102 exists between the inner face of the bridge 21 and the corresponding portion of the seat 10-1, thus fallowing a leakage of steam. In order to avoid this undesirable result above referred to, the structure shown in Fig. 10 may be resorted to. In Fig. 10, the cup is indicated at 103 and the longitudinal slots therein are indicated at 104, these slots 104 being of curved cross sectional contour, the recesses being indicated at 105. The segmental ring is shown at 106 and is provided with seats 107 receiving bridges 108, the same having lugs or ribs 109 which are rounded or curved to conform to the curvature of the slots 104. As shown in Fig. 11, the rib or lug 109 is located adjacent the center of the bridge 108 but, if desired, as shown in Fig. 12, wherein the bridge is indicated at 110, the curved lug or rib 111 may be located adjacent one end of the bridge, depending upon the manner in which the bridge and the ring assembled therewith are mounted in the cup. Owing to the fact that the bridge 109 is curved, and owing to the fact that the slot of the cup is curved as indicated at 104, the bridges 108 will be permitted to have a rocking movement, and thus will conform properly to the seat 107, he opening indicated at 102 in Fig. 9 being avoided. Obviously, the construction depicted in Fig. 10 may be employed in the structure shown in Fig. 1 or in that shown in Fig. 4, or under other circumstances which 'will readily suggest themselves to the user, it being unnecessary to describe and illustrate many modifications depending merely upon the number and the positions of the ackinO rin s in the cu 3. l e

\ Where a high steam pressure is to be contended with, the structure depicted in Fig. 13 will be found useful. In Fig. 13 the `cup is indicated at 112 and the slots or seats are shown at 114,.the same being curved transversely as hereinbefore described. A; plurality of packing rings 113 are provided, the bridges being shown at 115 and the lugs or ribs thereon at 110. The bridges in the successive rings are disposed in break-joint relation, as .will be understood readily from Fig. 13.

Having thus described the invention, what is claimed isz 1. In a packing of the class described, a reciprocating element; a segmental ring surrounding the reciprocating element and having a curved external seat; a cupsurrounding the ring and having a curved internal seat; a cylindrical key lodged in the seats; means for limiting the movement of the cup longitudinally of the reciprocating element; and means for moving the ring longitudinally of the reciprocating element.

2. In a packing of the class described, a reciprocating element; a segmental ring surrounding the reciprocating element and havinga curved external seat; a cup surrounding the ring and having a curved internal seat, the seats being of different radii; a cylindrical key loosely mounted in one seat and conforming to the curvature of the other seat; means for limiting the movement of the cup longitudinally of the reciprocating element; and means for moving the ring longitudinally of the reciprocating element.

3. In a packing of the class described, an inclosing structure; a ring abutting against the inclosed structure; a cup abutting against the ring; segmental rings within the cup; means for preventing the segmental rings from rotating in the cup; and a rod mounted to slide in the segmental rings; the abutting faces of the first specified ring and the inclosing structure being curved upon an arc, the center of which is located within the inclosing structure, thereby to permit the cup and the iirst specified ring to rock as one piece with respect to the inclosing structure, upon a rocking movement of the rod.

4. In a packing of the class described, a reciprocating element; a cup surrounding the reciprocating element and provided with a seat and with a slot; a primary segmental ring located within the cup; a bridge assembled with the primary segmental ring and engaged in the slot; secondary segmental rings located within the cup; a key engaged with the peripheries` of both of the secondary segmental rings and engaged in the seat; means for limiting the movement of the cup longitudinally of the reciprocating element and means for moving the rings longitudinally of the reciprocating element.

5. In a packing of the class described, a reciprocating element; a cup surrounding the reci rocating element, the cup being provide with a longitudinal slot and havingl a curved internal'seat; ai ymental ring located within the cup; a bridge 'engaged with the segmental ring and including a rib engaged in the slot; a secondary segmental ring located within the cup and'provided with an external, curved seat; v a cylindrical key engaged in the seats; means for limiting the movement of the cup longi-k tudinally of the reciprocatingelement; and means for moving the rings longitudinally of the reciprocating element. l

6. In. a packing of the class described,lan inclosingstructure; a rod mounted to reciprocate in the inclosing structure; a cup surrounding the rod; a packingring interposed between the cup and one end of the inclos ing structure; a primary segmental ring located within the cup; means for preventing relative rotary movement between the primary ring and the cup; a pair ofsecondary rings located within the cup; a sin? gleV elementinterlocked with the secondary rings and the cup to prevent relative rotary movement between the secondary rings upon primary segvthe one hand, and between the secondary rings and the cup upon'the otl1erhan`d;a

carrying ring surrounding the rodand abut- 7. ln a packing of the-classdes'c'ribed,l a

cup having a longitudinal lgroove which is transversely curved; a segmental ring in the cup and provided withra seat; and a bridge mounted upon the seat, the bridge being provided with a projecting rib which is curved to conform to they groove and is adapted to rock in the groove.

` In testimony that I claimtli'e `foregoingas 'myown, l have hereto aliXed my signa'-V ture in the presence of two witnesses.

p THOMAS SMlTH. o

Witnesses:

THOMAS D. JnNsoN, VENA D; BONNEY.

Qopiel'of this patent may be obtained for five cents each,y addreesiirgy the Commissioner of atenta, Washington, D. 0; i 

